Manifold for multicylinder internal-combustion engines



' 1,634,823 July 1927' A. P. BRUSH NANIFOLD F08 MULTICYLINDER INTERNALCOMBUSTION ENGINES Filed June 11. 1920 V 2 Sheets-Sheet 1 @wvantoz 656a,M0717? Era/M attunup July 5, 1927. 1 634,;23

A. P. BRUSH MAfiIFOLD Fba MULTIGYLINDER INTERNAL COMBUSTION ENGINESFiled June 11. 1920 2 Sheets-Sheet 2 I Patented July 5, 1927.

UNITED STATE-S I ALANSON nnnusn, or DETROIT, MICHIGAN.

- MANIFOLD FOR MULTICYLINDER INTERNAL-COIMBUSTION ENGINES.

Application filed June 11, 1920. Serial No. 388,189.

The invention relates to manifolds for multi-cylinder internalcombustion engines and consists in the novel construction by which aproportionate and homogeneous mixture is fed to each of the cylinders.To this end the invention consists in the construction as hereinaftersetforth.

In the drawings:

Figure 1 is a front'elevation partly in section of the manifold; V

Figure 2 is a horizontal section on line 22 of Figure 1 1 Figure 3 is avertical central cross-section on line 3-3 of Figure 1.

In the operation of internal combustion engines by explosive mixturesformed of air and liquid fuel there is a tendency for the mixture formedin the carburetor to lose its homogeneity in passing through themanifold. subdivisions of the manifold are not symmetrical and alsowhere there is a change in direction of the stream. Furthermore, wherethe stream is passing through straight portions of the manifold, thefrictional resistance of the walls will retard the velocity of the outerportions of the stream with the result that more or less of the liquidcar ried in suspension will drop out and collect on the walls. Thus itis difficult to main tain just the same quantity and quality of mixturein each of the several cylinders.

WVith the present invention greater homogeneit-y of the mixture ismaintained byv symmetrizing the stream in advance of the firstsubdivision thereof and by arranging in alignment with said symmetrizingmeans, but out of the path of the subdivisions, a heated chamber, inwhich any liquid which is thrown out of the divided stream will bevaporized and returned thereto.

In detaihA is the exhaust manifold for a multi-cylinder engine, and I3is the-inlet manifold, both being arranged on the same side of theengine block. C is the inlet to the manifold B which, as shown, is across over passage in the engine block, the carburetor (not shown) beingarranged on the opposite side of said block, I) isa portion of themanifold B in alignment with the passage C and from which the branches Eand E extending laterally. There is also a straight passage F throughthis portion D which communicates with the chamber G surrounding aportion H of the exhaust conduit A. I is a member This is particularlytrue where the placed at the entrance to the portion D forming a Venturipassage by which the stream of mixture passing through the cross-over Cwill be symmetrized. As this venturi is in direct alignment with thepassage I any liquid carried in suspension and which is thrown out ofthe stream at the bend by its own inertia will enter the pocket G andthis being heated by the exhaust conduit, will vaporize the liquid andreturn the vapor into the streanr. y

In the specific construction preferably employed the manifolds and Bareseparately formed, so that the portions D and G thereof will registerand securing means, such as bolts 'or studs J, will clamp these portionstogether. The branches E and E of the manifold B extend to the inletports in the block from which passages extend to the differentcylinders.

With the construction as described there is no tende cy to heat the airin the explosive mixture or that portion of the liquid fuel in themixture which remains in suspension, but the larger masses of liquid,which would tend to collect on the walls of the conduit, are thrownthrough the port F into the chamber G and will be vaporized andreturned. Any portion of the liquid fuel which may fall out in thecross-over passage G will be again picked up and commingled with thestream by the venturi I and as this venturi symmetrizes the stream, thedivided portions thereof passing through the branches E and E will beuniform in quality. V

WVhat I claim as my invention is:

1. In a multi-cylinder engine, the combination with an intake conduithaving a plurality of symmetrically arranged branches, of a venturi inadvance of said branches for symmetrizing the stream before subdividingthe same, and a heated chamber communicating with said conduit inalignment,

with said venturi for receiving and trapping any portion of the liquidfuel thrown out of the stream by its inertia and for vaporizing andreturning the same.

2. In a multi-cylinder engine, the combination with an intake conduit,an inlet por tion and a plurality of symmetrically arranged laterallyextending branches, an exhaust conduit adjacent to said intake conduit,and a chamber integral with said exhaust conduit and disposed beyond thejuncture of said intake inlet portion and its branehea, aaid chamber((Hlllllllllltflt'iHit with said intake in alignment with the inletyortion thereot l'or reeeiviing Elli trapping an portion of the liquidl'nel thrown out by its inertia when the direetion of the atreain is;el'ianged.

3.111 a multi-qrlinder internal ('illllbllS- tion engine, theeoinhination \fh an engine block having a eroaa-orer pamore tor theintake, of an inlet manifold delaraabl x arranged on one aide ol aaidblorl; having a portion ronnnuniratino with aaid rro:-;- -o\'er, and aplurality of laterally ntending braiiehee on opposite rider; thereetl.an em haust conduit on the name ride, ot the blorlC having a portionextending' adjaront to raid intake aiaiiilold. and a ehainbrrauriaaraling said exhaust uonduit ronuuuniraa with said intake manifoldin alinnnu-nl ah said erosaover, whereby any liquid lurl thrown out oilthe atreain by its inertia will he reoeired by said ehainher, vaporizedand re turned.

t. In a mulli-eyliuder engrinm the emulsination with an intake conduitharingg; a aubstantially horizontal portion, a pair of" l'a-anohparsageways extending laterally ot Fillt'l horizontal portion inopposite direotions, and a heated elnnnber oomn'nmieating in alignmentwith said horizontal portion and disposed on the opposite side of saidbranch guaesageway from said horizontal portion, said chambercommunicating with said horiximtal portion.

In a niuliii-cylinder engine, the combination with an intake conduit:-haring a horiaontal portion, a pair of branch passage ways extendinglaterally of said horizontal portion in opposite directions forming abend, a horizontally arranged chamber in alig nnnent with saidlnnrizoirlal portion and iflisposed on the opposite side o'l' saidlaler-- ally extending braneh paasagewaya from said horizontal portion,the boltomot said ehamber bein slightly lower than said hor- .iaontalportion, and an exhauat conduit extending substantially vertieallythrough said chamber forming an annular heated. chamber surrounding thesame.

in testimony whereof I allix my signature.

ALANSON P. BRUSH.

